How to you buy a country? With over 80 billion stashed in banks and bunkers. Gadhafi has ample cash, in all denominations, to keep paying his mercenary armies and "loyal" government for at least another decade, to buy arms and vilify his opposition. The compound where has has voluntary civilians camping out as human shields is believed to hold the bulk of those funds.
His loyal subjects have been bombarded with propaganda and his image their whole lives, living in an almost 1984 Big Brother environment. His enemies disappear through attrition.
-Sources: Fox News, ABC, Wall Street Journal.